“Ours is not only a fortunate people, but a very commonsensical people, with vision high, but their feet on the earth, with belief in themselves and faith in God. Whether enemies threaten from without or menaces arise from within, there is some indefinable voice saying, '. Here is the sample of liberty no storms may shake. Here are the altars of freedom no factions shall destroy. It was American in conception, American in its building. It shall be American in the fulfillment. Factional once, we are all American now. And we mean to be all Americans to all the world.”

1970s, Proclamation 4417 (1976)
Variant: I call upon the American people to affirm with me this American Promise -- that we have learned from the tragedy of that long-ago experience forever to treasure liberty and justice for each individual American, and resolve that this kind of action shall never again be repeated.

"Cox Office Shut On Nixon's Order" Oelsner, Lesley (October 21, 1973 : The New York Times), p. 60

And that is exactly what we will do, with the help of God and one another.
2010s, 2017, Speech at "Spirit of Liberty: At Home, In the World" event (2017)

1910s, Letter to the American Defense Society (1919)
Context: In the first place we should insist that if the immigrant who comes here in good faith becomes an American and assimilates himself to us, he shall be treated on an exact equality with everyone else, for it is an outrage to discriminate against any such man because of creed, or birthplace, or origin. But this is predicated upon the man's becoming in very fact an American, and nothing but an American. If he tries to keep segregated with men of his own origin and separated from the rest of America, then he isn't doing his part as an American. There can be no divided allegiance here. Any man who says he is an American, but something else also, isn't an American at all. We have room for but one flag, the American flag, and this excludes the red flag, which symbolizes all wars against liberty and civilization, just as much as it excludes any foreign flag of a nation to which we are hostile. We have room for but one language here, and that is the English language, for we intend to see that the crucible turns our people out as Americans, of American nationality, and not as dwellers in a polyglot boarding-house; and we have room for but one soul loyalty, and that is loyalty to the American people.

Speech http://teachingamericanhistory.org/library/document/the-nations-problem/

1920s, Ordered Liberty and World Peace (1924)

We have appealed to Heaven for the justice of our cause, and in Heaven we have placed our trust. [...] We shall never be abandoned by Heaven while we act worthy of its aid and protection.
addressing a meeting of delegates to the Continental Congress, assembled at Yorktown, Pennsylvania, September 1777 ; as quoted in The Life and Public Services of Samuel Adams, Volume 2, by William Vincent Wells; Little, Brown, and Company; Boston, 1865 ; pp. 492-493

John Mulaney Stand-Up Monologue - SNL https://www.youtube.com/watch?v=-mSGwndFMp8, 03 March 2019

Though Lafayette, himself a Roman Catholic, might conceivably have said something translatable as this, the earliest source yet found for this is an anti-catholic pamphlet The Future Conflict : An Address, (1878), by Order of the American Union, p. 20, without any citation of original sources. It has also been quoted as: "If the liberties of the American people are ever destroyed, they will fall by the hands of the clergy."
Disputed